BD4952G-TR

Overview

The BD4952G-TR is a standard voltage detector IC from ROHM Semiconductor, designed for monitoring power supply voltages. It features a typical under-voltage detection threshold of 5.2V with a precision of ±1%. The device operates within a reset active voltage range of 0.95V to 10V and utilizes a CMOS output type. It supports a low reset active state and lacks manual reset or watchdog timer functions. The circuit current is specified at 0.60μA (ON) and 0.85μA (OFF) at Vs=4.8V. Hysteresis is defined as Vs x 0.05. Output currents are 0.4mA (LowVol) and 2mA (HighVol). It operates between -40°C and 105°C in an SSOP5 package.

Feature Summary

• CMOS output interface for direct logic interfacing
• High detection accuracy with ±1% precision
• Low current consumption suitable for battery applications
• Wide operating voltage range up to 10V

Applications

• Processor supervisor circuits
• Battery voltage monitoring systems
• Portable electronic device power management

Procurement Notes

Verify the specific ordering suffix and package variant against the official datasheet to ensure compatibility with existing board layouts. Confirm that the CMOS output characteristics meet the input requirements of the downstream logic components. Check the RoHS compliance status and environmental certifications required for the target market. Ensure the supply status aligns with long-term production needs, as this component may have limited availability.

Selection Notes

Select this component when a CMOS output is preferred over open-drain configurations for cleaner signal transitions. Consider the ±1% precision requirement for critical voltage thresholds. Evaluate the 0.95V to 10V reset active range to ensure it covers the system's operational voltage window. Verify that the lack of delay timer and watchdog features does not conflict with system safety requirements.

Part Context

The BD4952G-TR belongs to the BD49xxx series of high-accuracy, low-current voltage detector ICs. This series provides various detection voltages from 2.3V to 6.0V in 0.1V increments. The device is part of ROHM's portfolio of supervisory circuits designed for compact, surface-mount applications requiring precise voltage monitoring.

Replacement Considerations

BD5250G-1TR is listed as a recommended replacement with the same SSOP5 package. Note differences in output type (Open Drain vs CMOS), precision (±0.9% vs ±1%), and reset active voltage range (0.8V to 6V vs 0.95V to 10V). Verify electrical compatibility before substitution.